import math
import numpy as np

# print(math.asin(1))
# print(math.degrees(math.asin(1)))

a = np.array([1, 1, 3, 3])
b = np.array([1, 3, 1, 3])
c = np.vstack((a, b))
print(np.cov(c))
print(np.corrcoef(c))
